Back in the fall of last year I noticed that my turn signal sound no longer was working, along with all of the warning sounds such as the seat belt, door open with key in, low tire pressure ect. Of course the left front speaker no longer has sound either as that is where the turn signal and warning indicator sounds come from. In my opinion this is a safety issue and should be addressed as such. I not sure if just replacing the left (or both front) speakers would take care of this issue or not.